Are you saying you have excessive front blowout?
Is your deck level & 1/4" lower in the front, measured at the blade-tips, not the deck edge?
Is the deck clean underneath?
Which blades are you using?
If you have front blowout problems you're moving too much air for the deck capabilities. If you're using the M152726 (hi-lifts), try the M143520 blades.
The Oregon G5 blades for you would be the 596-719s.
I don't call them a mulch blade 'cause they're not wavy.
They're actually intended to chop the clippings smaller with side-discharge.
They're considered hi-lift, so with your deck they may move too much air & cause front blowout.